Remove the generated tests/*/Makefile.am files from version control.

Remove the generated tests/*/Makefile.am files from version control.
* tests/cut/Makefile.am: git-remove this generated file.
* tests/head/Makefile.am: Likewise.
* tests/join/Makefile.am: Likewise.
* tests/pr/Makefile.am: Likewise.
* tests/sort/Makefile.am: Likewise.
* tests/tac/Makefile.am: Likewise.
* tests/tail/Makefile.am: Likewise.
* tests/test/Makefile.am: Likewise.
* tests/tr/Makefile.am: Likewise.
* tests/uniq/Makefile.am: Likewise.
* tests/wc/Makefile.am: Likewise.
* .cvsignore, .gitignore: Ignore these generated files.

* src/.cvsignore, src/.gitignore: Add chcon here, ...
* .cvsignore, .gitignore: ... not here.